I think there is a bit of confusion on your part, you seem to be confusing the company Canonical who make Ubuntu with the English meaning of the word, it is an easy mistake to make here, a relevant definition of the word (from dictionary.com via Zanna in comments)
authorized; recognized; accepted:
So what they actually want is a definitive or best answer ...
You don't need to be logged in to Ask Ubuntu to only read questions and answers, but you do need to be logged in to vote, accept an answer, comment, mark your question as a duplicate of another question, and delete anything you posted on Ask Ubuntu.
Another advantage of being logged in is the Recent inbox messages icon
at the right side of the Ask Ubuntu ...
Long answer: No, You may log out but then you have to log in again to check if your question has been answered. You may check at regular/ irregular intervals to see if your questions has been answered and you will need to login each such time.
It wasn't identified as spam, on the contrary, it was identified as high quality and that's why it was used in a review audit. Review audits are there to stop "robo reviewing": people who just blindly click through a review queue in order to get a badge. Yes, such people actually exist and they're why we have review audits in the first place.
Related post on Meta SE: How do you delete a room on chat?
Related chat FAQ: Will these rooms exist forever?
Quote (emphasis mine):
Rooms will exist indefinitely, so long as there is at least one person actively talking in the room. A room is considered worth retaining if it has more than 15 messages by at least 2 users.
Rooms not worth retaining which are ...
Don't worry about it. Inactive rooms are deleted automatically by the system. I don't remember if non-mods can delete the rooms they created, but if you can, it will be on the "Access" tab.
So, try going to https://chat.stackexchange.com/rooms, find your room, click on the "info" link of the room, go to "access" and see if you ...